yufan.me/themes/spectre/dist/styles/prism.css

pre.line-numbers {
    position: relative;
    padding-left: 3.8em!important;
    counter-reset: linenumber
}

pre.line-numbers>code {
    position: relative
}

.line-numbers .line-numbers-rows {
    position: absolute;
    pointer-events: none;
    top: 0;
    font-size: 100%;
    left: -3.8em;
    width: 3em;
    letter-spacing: -1px;
    border-right: 1px solid #999;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none
}

.line-numbers-rows>span {
    pointer-events: none;
    display: block;
    counter-increment: linenumber
}

.line-numbers-rows>span:before {
    content: counter(linenumber);
    color: #999;
    display: block;
    padding-right: .8em;
    text-align: right
}

code[class*=language-],
pre[class*=language-] {
    color: #657b83;
    font-family: Consolas, Monaco, Andale Mono, Ubuntu Mono, monospace;
    text-align: left;
    white-space: pre;
    word-spacing: normal;
    word-break: normal;
    word-wrap: normal;
    line-height: 1.5;
    -moz-tab-size: 4;
    -o-tab-size: 4;
    tab-size: 4;
    -webkit-hyphens: none;
    -moz-hyphens: none;
    -ms-hyphens: none;
    hyphens: none
}

code[class*=language-] ::-moz-selection,
code[class*=language-]::-moz-selection,
pre[class*=language-] ::-moz-selection,
pre[class*=language-]::-moz-selection {
    background: #073642
}

code[class*=language-] ::selection,
code[class*=language-]::selection,
pre[class*=language-] ::selection,
pre[class*=language-]::selection {
    background: #073642
}

pre[class*=language-] {
    padding: 1em;
    margin: .5em 0;
    overflow: auto;
    border-radius: .3em
}

:not(pre)>code[class*=language-],
pre[class*=language-] {
    background-color: #fdf6e3
}

:not(pre)>code[class*=language-] {
    padding: .1em;
    border-radius: .3em
}

.token.cdata,
.token.comment,
.token.doctype,
.token.prolog {
    color: #93a1a1
}

.token.punctuation {
    color: #586e75
}

.namespace {
    opacity: .7
}

.token.boolean,
.token.constant,
.token.deleted,
.token.number,
.token.property,
.token.symbol,
.token.tag {
    color: #268bd2
}

.token.attr-name,
.token.builtin,
.token.char,
.token.inserted,
.token.selector,
.token.string,
.token.url {
    color: #2aa198
}

.token.entity {
    color: #657b83;
    background: #eee8d5
}

.token.atrule,
.token.attr-value,
.token.keyword {
    color: #859900
}

.token.function {
    color: #b58900
}

.token.important,
.token.regex,
.token.variable {
    color: #cb4b16
}

.token.bold,
.token.important {
    font-weight: 700
}

.token.italic {
    font-style: italic
}

.token.entity {
    cursor: help
}